I know law, and custom, and education, and friends, when they side with godliness, are a great advantage to it, by affording helps, and removing those impediments that might stick much with carnal minds. But truth is not your own, till it be received in its proper evidence; nor your faith divine, till you believe what you believe, because God is true who doth reveal it; nor are you the children of God, till you love him for himself; nor are you truly religious, till the truth and goodness of religion itself be the principal thing that maketh you religious. It helpeth much to discover a man's sincerity, when he is not only religious among the religious, but among the profane, and the enemies, and scorners, and persecutors of religion: and when a man doth not pray only in a praying family, but among the prayerless, and the deriders of fervent constant prayer: and when a man is heavenly among them that are earthly, and temperate among the intemperate and riotous, and holdeth the truth among those that reproach it and that hold the contrary: when a man is not carried only by a stream of company, or outward advantages, to his religion, nor avoideth sin for want of a temptation, but is religious though against the stream, and innocent when cast (unwillingly) upon temptations; and is godly where godliness is accounted singularity, hypocrisy, faction, humour, disobedience, or heresy; and will rather let go the reputation of his honesty, than his honesty itself.
From Richard Baxter’s “Christian Directory” http://a.co/0rbSMSd