one can cultivate in oneself what he wishes...

The wise man submits to conditions when he is helpless, bowing to the
will of God. But the evil that is avoidable he roots out without
sparing one single moment or effort.

Bowl of Saki, by Hazrat Inayat Khan

Commentary by Pir-o-Murshid Inayat Khan:

By looking for happiness, what does man seek after? He is seeking
after his self, though he does not know it. ... The more one
understands oneself, the more one finds that everything that one
finds lacking in others is also lacking in oneself. Does a person
become less by finding faults in oneself? No, he becomes greater, for
he not only finds that the faults which are in others are also to be
found in him, but that all merits of the others are also his own
merits. With faults and merits he becomes more complete, he does not
become less.

What a great treasure it is when a man has realized that in him are
to be found all the merits and all the faults which exist in the
world, and that he can cultivate all that he wishes to cultivate, and
to cut away all that should be removed! It is like rooting out the
weeds and sowing the seeds of flowers and fruits. One finds that all
is in oneself, and that one can cultivate in oneself what he wishes.
A world opens for the man who begins to look within himself, for it
is not a little plot of ground that he has to cultivate, he has a
world to make of himself and to make a world is sufficient occupation
to live for. What more does one want? Many think that life is not
interesting because they make nothing, but they do not realize that
they have to make a world, that they are making a world, either
ignorantly or wisely. If they make a world ignorantly then that world
is their captivity, if they make a world wisely then that world is
their paradise.