Let no man despise your youth; but be an example to those who believe, in word, in your way of life, in love, in spirit, in faith, and in purity.
In faith — εν πιστει. This word πιστις is probably taken here for fidelity, a sense which it often bears in the New Testament. It cannot mean doctrine, for that has been referred to before. Be faithful to thy trust, to thy flock, to thy domestics, to the public, to thy GOD. Fidelity consists in honestly keeping, preserving, and delivering up when required, whatever is intrusted to our care; as also in improving whatever is delivered in trust for that purpose. Lose nothing that God gives, and improve every gift that he bestows.