A strong passion for any object will ensure success, for the desire of the end will point out the means.
[Science is] the desire to know causes.
The wretched are in this respect fortunate, that they have the strongest yearning after happiness; and to desire is in some sense to enjoy.
The origin of all science is the desire to know causes, and the origin of all false science is the desire to accept false causes rather than none; or, which is the same thing, in the unwillingness to acknowledge our own ignorance.
The contemplation of truth and beauty is the proper object for which we were created, which calls forth the most intense desires of the soul, and of which it never tires.
It is better to desire than to enjoy, to love than to be loved.
While we desire, we do not enjoy; and with enjoyment desire ceases.
It is not the passion of a mind struggling with misfortune, or the hopelessness of its desires, but of a mind preying on itself, and disgusted with, or indifferent to all other things.
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