Jim Rohn, is almost an endless well of wisdom, as witness this passage of his:

“What we ponder and what we think about sets the course of our
life. Any day we wish; we can discipline ourselves to change it
all. Any day we wish, we can open the book that will open our mind
to new knowledge. Any day we wish, we can start a new activity. Any
day we wish, we can start the process of life change. We can do it
immediately, or next week, or next month, or next year.

“We can also do nothing. We can pretend rather than perform. And if
the idea of having to change ourselves makes us uncomfortable, we
can remain as we are. We can choose rest over labor, entertainment
over education, delusion over truth, and doubt over confidence. The
choices are ours to make. But while we curse the effect, we
continue to nourish the cause. As Shakespeare uniquely observed,
“The fault is not in the stars, but in ourselves.” We created our
circumstances by our past choices. We have both the ability and the
responsibility to make better choices beginning today.”