Union with God

Ignoring the imperfections of others, preserving silence and a continual communion with God will eradicate great imperfections from the soul and make it the possessor of great virtues. (St. John of the Cross, The Sayings of Light and Love, 118)

Someone asked Abba Anthony, 'What must one do in order to please God?' The old man replied, 'Pay attention to what I tell you: whoever you may be, always have God before your eyes; whatever you do, do it according to the testimony of the holy Scriptures; in whatever place you live, do not easily leave it. Keep these three precepts and you will be saved.' (Sayings of the Desert Fathers, Abba Anthony, 3)

That we should establish ourselves in a sense of God's presence by continually conversing with Him. That it was a shameful thing to quit His conversation to think of trifles and fooleries. (Brother Lawrence, The Practice of the Presence of God, First Conversation)