"I urge you, Madam, a nearer communion with Christ, and a growing
communion. There are curtains to be opened in Christ that we
have never seen before, and new layers of love in Him. I despair
that I will ever make it to the far end of that love, there are
so many layers in it. Therefore dig deep, and sweat, and labour. Take pains for Him, and set aside as much time as you can in
each day for Him. Christ will be won with labour."
— Samuel Rutherford (a letter to Lady Kenmure, 1637).