Karma Yoga. New York, 1896. Complete Works, 1: 109 - Swami Vivekananda

All the great systems of ethics teach absolute unselfishness as the
goal. When a man reaches this absolute selfishness, he is no more the
little Mr. So-and-so. He acquires infinite expansion. The little
personality which he had before is now lost to him for ever. He
becomes infinite. The attainment of this expansion is indeed the goal
of all religions and of all moral and philosophical teachings.

Karma Yoga. New York, 1896. Complete Works, 1: 109

The Gospel of Strength

You must know what you are, what your real nature is. You must become
conscious of that infinite nature within. Then your bondage will
burst.

Think all of you that you ate the infinitely powerful Atman, and see
what strength comes out.

"Knowledge is power," says the proverb, does it not? It is through
knowledge that power comes. Man has got to know that he is a man of
infinite power and strength. Really he himself is by his own nature
potent and omniscient. And this he must know. And the more he becomes
conscious of his own Self, the more he manifests this power, and his
bonds break and at last he becomes free.

The Gospel of The Holy Mother

Remember this much: 'I have someone to look after me. There is
certainly a Mother or Father.' P. 242 The Gospel of The Holy Mother

The Gospel of Strength - The Source of Strength - Soul!

What we need is strength; who will give us strength? There are
thousands to weaken us and of stories we have had enough. Every one of
our Puranas, if you press it, gives out stories enough to fill three-
fourths of the libraries of the world. Everything that can weaken us
as a race we have had for the last thousand years... Therefore, my
friends, as one of your blood, as one that lives and dies with you,
let me tell you that we want strength, strength, and everytime
strength. And the Upanishads are the great mine of strength. Therein
lies strength enough to invigorate the whole world; the whole world
can vivified, made strong, energised through them.

Strength, strength is what the Upahishads speak to me from every
page. This is the one great thing to remember, it has been the one
great lesson I have been taught in my life. Strength, it says,
strength, O man, be not weak. Are there no human weaknesses? - says
man. There are, say the Upanishads, but will more weakness heal them?
Would you try to wash dirt with dirt? Will sin cure sin? Will weakness
cure weakness? Strength, O man, strength, say the UPanishads, stand up
and be strong.

First step in getting strength is to uphold the Upanishads, and
believe - "I am the soul," "Me the sword cannot cut; nor weapons
pierce; me the fire cannot burn; me the air cannot dry; I am the
Omnipotent, I am the Omniscient." So repeat these blessed saving words
and be strong.

P. 242 The Gospel of The Holy Mother

What is the good in doing Japa for a whole day if there is no
concentration of mind? Collectedness of one's mind is essential, then
only His grace descends. P. 242 The Gospel of The Holy Mother

Swami Vivekananda - Conversation with Priya Nath Sinha

At your very threshold, God himself in the form of a poor beggar is
dying of starvation. Instead of giving him anything, would you only
satisfy the appetites of your wife and children with delicacies? Why,
that is beastly!

Conversation with Priya Nath Sinha. Recorded in Bengali. CW, 5: 382