You -- The "you" used here is an actual pronoun, used as a subject. Since this information is part of the noun in Greek, the pronoun is only used to emphasize it as we would say "you yourself" in English.  It is singular.

missing "yourself" -- (MW)  The subjective pronoun repeats the information in the verb so it should be repeated in English like "you yourself."

have -- (WT) This helping verb "have" should indicate that the following verb is the tense indicating an action completed in the past. This is not the tense of the verb here.

said: -- "Said" is from means "to say" and "to speak" also. It is not the word Christ uses to refer to his own speaking. It is not the same word used below by Jesus to refer to his own speaking. The tense of this word is present.

so -- There is no Greek word here, but Greek does not need pronouns when the object can be assumed from the context. In English, they are added for the subject-verb-object form of our sentences.

But--(CW) "But" is from a word that means "except", "save", "besides," and "in addition to." It is not the word usually translated as "but."

I -- This is from the first-person, singular form of the following verb.

say -- The word translated as "say" is the most common word that means "to say," and "to speak." This is the most common and casual . It also has many ancillary meanings such as "to count" ("to number" or like we might say, "to recount" a story) or "to choose for yourself." Christ usually uses this word to refer to his own speaking or teaching.

to -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English, but the translator must decide which preposition to use: a "to" as an indirect object, a "with" for instruments, an "in" for locations, an "as" for purposes, an "of" for possession, a "by" for agents, an "as" for comparisons, "at" or "on" a time, and an "in" for area of effect.

all of -- (IP) There is nothing that can be translated as "all of" in the Greek source.

you: -- The Greek pronoun "you" here is plural and in the form of an indirect object, "to you", "for you", etc.

From now on  - "From now on" is from two Greek words meaning "from now" as we would say "from now on." -- The word translated as "from" means "from" in both location and when referring to a source.

you -- This is from the second-person, plural form of the following verb.

will - This helping verb "will " indicates that the following verb is the future tense. Helping or auxiliary verbs are needed to translate the Greek verb forms into English.

see -- "See" is from a verb that means "to look", "to have sight", "to observe", "to look out for," and so on. It is a metaphor for mental sight, "to perceive", "to discern", "to see visions", "to appear in visions (passion), and "to interview." Christ usually uses this word to refer to seeing something symbolical as we might say, "envision."

the -- The word translated as "the" is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

Son -- The word translated as "son" more generally means "child" or "children". It can refer to all offspring in later generations, just like "father" refers to all previous generations. Jesus also used it metaphorically to describe those who follow a way of thought or set of beliefs that descend from an individual. More about it in this article.

of -- This word "of"  comes from the genitive case of the following word that required the addition of a preposition in English.  The most common is the "of" of possession, but it can also mean "belonging to," "part of", "which is", "than" (in comparisons), or  "for", "concerning" or "about" with transitive verbs. 

missing "the" -- (MW) The untranslated word is the Greek definite article, "the."   The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

Man -- The Greek word for "man" means "man", "person" and "humanity" in the singular. In the plural, it means "men", "people", and "peoples". 

sitting -- "Sitting" is from a verb "be seated", "sit," especially of courts, councils, assemblies, etc. The form is an verbal adjective, "sitting", but the tense is of an action completed in the past and the voice is where the subject acts on himself so, "having seated himself."

on -- The Greek preposition translated as "on" means "out of" or "from," but referring to place, as this seems to, it means "beyond" or "outside." In Mark, this is where the son of the man is seen but in Matthew it is where he is seated.

the -- (IW) There is no Greek word that can be translated as "the" in the source we use today nor was there one in the source that the KJV translators used. It was added for clarity.

right --"Right" is from an adjective used as a noun "on the right hand", "fortunate", "skillful," and "kindly."

hand -- There is no separate Greek word that can be translated as "hand" but it is implied by the previous word.

of -- This word "of"  comes from the genitive case of the following word that required the addition of a preposition in English.  The most common is the "of" of possession, but it can also mean "belonging to," "part of", "which is", "than" (in comparisons), or  "for", "concerning" or "about" with transitive verbs. 

the   -- The word translated as "the" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

Mighty ,  - (WF) "Mighty" is from a word that describes abilities and capacities, what actions a person can do or has done so "power", "might", "influence", "authority," and "force." It does not carry the sense of authority over others, either people or laws. The "of" comes from the form of the word. Here, it seems to described the nature of the right hand.

One -- This comes from the article before the word "mighty." This is justified for an adjective, but not a noun.

and -- The Greek word translated as "and" is used as the conjunction "and", but it also is used to add emphasis ("also"). In a series, it is can be translated as "not only...but also." After words implying sameness "as".

coming The word translated as "coming" primarily means "to start out" but Christ usually uses it to mean "come" but not always. It indicates movement, especially its beginning, without indicating a direction toward or away from anything, so it works either as "come" or "go." The form is a present participle so it is more like our phrase "being underway" or "showing up."

on -- The word translated as "in" means "against", "before", "by" or "on."

the -- The word translated as "the" is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

clouds "Clouds" is a noun that means "clouds" or "mist" but in Greek this word is associated with a metaphor for death and sorrow.

of -- This word "of"  comes from the genitive case of the following word that required the addition of a preposition in English.  The most common is the "of" of possession, but it can also mean "belonging to," "part of", "which is", "than" (in comparisons), or  "for", "concerning" or "about" with transitive verbs. 

missing "the" -- (MW) The untranslated word is the Greek definite article, "the."   The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

heaven. -- The word translated as "heaven" means sky, the climate, and the universe. It also meant the home of the gods in a physical sense: the sun, moon, and planets were named for the gods. More about the word in this article.