Gather:
"Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching." (Hebrews 10:25)
"Fulfill ye my joy, that ye be likeminded, having the same love, being of one accord,
of one mind. Let nothing be done through strife or vainglory; but in
lowliness of mind let each esteem other better than themselves. Look
not every man on his own things, but every man also on the things of
others." (Philippians 2:2-4)
Grow:
"But speaking the truth in love, may grow up into him in all things, which is the head, even Christ:" (Eph 4:15)
"As newborn babes, desire the sincere milk of the word that ye may grow thereby:" (1Peter 2:2)
Go:
"And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. GO ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: