The Gospel of Strength - Swami Vivekananda

What is sin and what is misery, and what are all these, but the
results of weakness?... Men are taught from childhood that they are
weak and sinners. Teach them that they are all glorious children of
immortality, even those who are the weakest in manifestation. Let
positive, strong, helpful thougts enter into their brains from very
childhood. Lay yourselves open to these thoughts, and not to weakening
and paralysing ones.

First build up your physique. Then only you can get control over the
mind.

Never can hatred and malice vanish from one's heart unless one
becomes a hero.