Francis Quarles Quote

Deliberate long before thou consecrate a friend, and when thy impartial justice concludes him worthy of thy bosom, receive him joyfully, and entertain him wisely; impart thy secrets boldly, and mingle thy thoughts with his: he is thy very self; and use him so; if thou firmly think him faithful, thou makest him so.

Uniform with the Enchiridion: Spare Minutes Or Resolved Meditations and Premeditated Resolutions (ed. 1822)