Acquaint yourself with your own ignorance. - Isaac Watts

Do not spend the day in gathering flowers by the way side, lest night come upon you before you arrive at your journey's end, and then you will not reach it.

From all who dwell below the skies
Let the Creator's praise arise;
Let the Redeemer's name be sung
Through every land, by every tongue.

Once a day, especially in the early years of life and study, call yourselves to an account what new ideas, what new proposition or truth you have gained, what further confirmation of known truths, and what advances you have made in any part of knowledge.