He first found his own brother, Simon, and said to him, "We have found the Messiah!" (which is, being interpreted, Christ{"Messiah" (Hebrew) and "Christ" (Greek) both mean "Anointed One".}).
The greatest contribution of this apostle would appear to have been the exercise of his ability to enlist others.  He enlisted his own brother, Peter; he discovered the lad with the barley loaves and fish; he, along with Philip, brought the Greeks to Jesus; and, upon at least one occasion, he was associated with the "inner three" in a private meeting with Jesus (Mark 13:3).  There is no evidence that he ever resented the greater prominence of his brother Peter; and he never tried to parlay that relationship into any special privilege for himself, as did James and John. As one of the twelve apostles, his name is inscribed upon the foundations of the Eternal City coming down from God out of heaven  (Revelation 21:14).