Here are nine quotes on friendship from Swami Vivekananda.
Quotes on Friendship for All
We must have friendship for all; we must be merciful towards those that are in misery; when people are happy, we ought to be happy; and to the wicked we must be indifferent. - Concentration: Its Spiritual Uses, Patanjali's Yoga Aphorisms, Volume 1
Everybody can show what evil is, but he is the friend of mankind who finds a way out of the difficulty. - My Plan of Campaign, Lectures from Colombo to Almora, Volume 3
There cannot be friendship without equality, and there cannot be equality when one party is always the teacher and the other party sits always at his feet. - Address of Welcome Presented at Calcutta and Reply, Lectures from Colombo to Almora, Volume 3
Rights and privileges and other things can only come through friendship, and friendship can only be expected between two equals. When one of the parties is a beggar, what friendship can there be? - The Influence of Indian Spiritual Thought in England, Lectures from Colombo to Almora, Volume 3
Friendship With God
Just as a man opens his heart to his friend and knows that the friend will never chide him for his faults but will always try to help him, just as there is the idea of equality between him and his friend, so equal love flows in and out between the worshiper and his friendly God. Thus God becomes our friend, the friend who is near, the friend to whom we may freely tell all the tales of our lives. The innermost secrets of our hearts we may place before Him with the great assurance of safety and support. He is the friend whom the devotee accepts as an equal. - Human Representations of the Divine Ideal of Love, Para-Bhakti or Supreme Devotion, Volume 3
I am my own friend, and I am my own enemy. I am Existence-Knowledge-Bliss Absolute. I am He, I am He. - The Free Soul, Lectures and Discourses, Volume 3
More Friendship Quotes
He must not be gushing in his friendship; he must not go out of the way making friends everywhere; he must watch the actions of the men he wants to make friends with, and their dealings with other men, reason upon them, and then make friends. - Each Is Great In His Own Place, Karma Yoga, Volume 1
Friendship with many is best at a distance, and everything goes well with the person who stands on his own feet. - XLII Miss Noble, Epistles - Third Series, Volume 7
In happiness, in misery, in famine, in pain, in the grave, in heaven, or in hell who never gives me up is my friend. Is such friendship a joke? A man may have salvation through such friendship. That brings salvation if we can love like that. - My Life And Mission, Lectures and Discourses, Volume 8
There it is your nine quotes on friendship from Swami Vivekananda.