This has got to be one of my favourite Fuller quotes.
It is taken from a sermon titled, “Soul Prosperity” (The Complete Works of Andrew Fuller, I:406)
“It is by retiring to our closets, reading the word of God in private, thinking and praying over it; by conversing with our own souls in secret, by dwelling on divine things, by giving such a tone to the soul that it falls naturally and easily into divine things; it is in these holy exercises that we may expect to meet a Divine blessing, and to acquire such a savour of spirit, that when we go out into the world we shall carry the savour of Christ with us. This is a prosperous and thriving state of soul.”
Working out Salvation with Fear and Trembling 