I The pronoun "I" is added to add emphasis that he is referring to his own words. It is unnecessary because the first-person indication is part of the verb ending. Christ sometimes uses it humorously to refer to himself redundantly as we would say "I myself."

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

am: The verb "am" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics.

and The Greek word translated as "and" is used as the conjunction "and", but it also is used to add emphasis ("also").

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

shall -- This helping verb "shall" indicates that the 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. The Greek article is much closer to our demonstrative pronouns ("this", "that", "these", "those"). See this article for more. 

Son -- The phrase "the son of man" is the common way Christ refers to himself. It is discussed in detail in this article. Its sense is "the child of the man." The word translated as "son" more generally means "child" or "descendant". The Greek word for "of man" in the singular means "person" and "humanity" and "people" and "peoples" in the plural.

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, 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. 

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

sitting --- (WT, WV) "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 passive voice so, "having .been seated."

on -- -- (CW) The Greek preposition translated as "on" means "out of" or "from." The word also means "beyond," "on," "in," "since," or "by"based upon its context, but it indicates separation "from" something rather than being a part "of" it like "of" does. It is also used to describe the author or means "by" which something is done, especially with passive verbs. 

the -- (WW)  There is no definite article here, but when a word doesn't have a definite article, the indefinite article can be added in English translation.

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

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, 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. 

power, -- "Power" 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.

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 best 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," but it is more like our phrase "being underway" or "showing up."

missing "by/for himself"-- (MW) An untranslated phrase is necessary because the form of the word is a middle voice, which means that the subject is to  acts of himself.

in -- (WW)  The word translated as "in" with a plural object in this form means "in the midst of,"or "among."

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, 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. 

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.