Mutual communion is the soul of all true friendship and a familiar converse with a friend hath the greatest sweetness in it … [so] besides the common tribute of daily worship you owe to [God], take occasion to come into his presence on purpose to have communion with him. This is truly friendly, for friendship is most maintained and kept up by visits; and these, the more free and less occasioned by urgent business … they are, the more friendly they are. … We use to check our friends with this upbraiding, You still [always] come when you have some business, but when will you come to see me? … When thou comest into his presence, be telling him still how well thou lovest him; labour to abound in expressions of that kind, than which … there is nothing more taking with the heart of any friend.
As cited in JI Packer, A Quest for Godliness (Wheaton: Crossway, 1990), 208.