Jen

“There are always plenty of rivals to our work. We are always falling in love or quarreling, looking for jobs or fearing to lose them, getting ill and recovering, following public affairs. If we let ourselves, we shall always be waiting for some distraction or other to end before we can really get down to our work. The only people who achieve much are those who want knowledge so badly that they seek it while the conditions are still unfavorable. Favorable conditions never come. There are, of course, moments when the pressure of the excitement is so great that only superhuman self-control could resist it. They come both in war and peace. We must do the best we can.

The second enemy is frustration—the feeling that we shall not have time to finish. If I say to you that no one has time to finish, that the longest human life leaves a man, in any branch of learning, a beginner, I shall seem to you to be saying something quite academic and theoretical. You would be surprised if you knew how soon one begins to feel the shortness of the tether, of how many things, even in middle life, we have to say "No time for that," "Too late now," and "Not for me." But Nature herself forbids you to share that experience. A more Christian attitude, which can be attained at any age, is that of leaving futurity in God's hands. We may as well, for God will certainly retain it whether we leave it to Him or not. Never, in peace or war, commit your virtue or your happiness to the future. Happy work is best done by the man who takes his long-term plans somewhat lightly and works from moment to moment "as to the Lord." It is only our daily bread that we are encouraged to ask for. The present is the only time in which any duty can be done or any grace received.”
― C.S. Lewis, The Weight of Glory