I. Consider what we are to understand by seeking the Lord. It is in His double aspect, combined but not contradictory character, as at once just and the justifier of them that believe in Jesus, as a God of justice to punish sin in the surety, and as a God of mercy to pardon it in the sinner, that we are to seek the Lord, and all the blessings which in that gracious character He has and He promises to bestow. Thus, to seek the Lord is just to approach Him by faith.
II. Inquire when the Lord is to be found, and we remark, (1) that the Lord, as bestowing the pardon of sin and salvation on the soul, is to be found in this world, not in another; (2) that the Lord is not to be found on a deathbed; (3) that the Lord is more likely to be found now than at any future time.
III. The shortness and uncertainty of life are strong reasons for seeking pardon and salvation now.
T. Guthrie, The Way to Life,p. 78.
Reference: Isaiah 55:6. Bishop Walsham How, Plain Words,2nd series, p. 47.