Conversion is most fully displayed when it leads converts to seek the conversion of others: we most truly follow Christ when we become fishers of men.
The great question is not so much what we are naturally, as what Jesus makes us by his grace: whoever we may be of ourselves, we can, by following Jesus, be made useful in his kingdom.
Our desires should be to be men-catchers; and the way to attain to that sacred art is to be ourselves thoroughly captured by the great Head of the College of Fishermen. When Jesus draws us we shall draw men.(C. H. Spurgeon, "CXXXI, Matthew iv.19" in Spurgeon's Sermon Notes: Matthew-Acts)