Preparation for Heaven

From the pen of Thomas Chalmers, to his friend Mrs. Jane Morton, March 20, 1840:

I have now entered on threescore, and desire to give up the remainder of my days on earth to a busy work of preparation for Heaven—a work of greatest difficulty, nay, impracticable, without the aids of that Spirit who alone can help our infirmities, and perfect strength in weakness.

Letters of Thomas Chalmers, edited by William Hanna, first published 1853, reprinted by The Banner of Truth, 2007, p. 227.