He sees that any advance which he is able to make in the way of spiritual progress or development is something secured not for himself alone but for others.

If he gains knowledge or self-control, he assuredly acquires much for himself, yet he takes nothing away from anyone else, but on the contrary he helps and strengthens others.

Cognizant as he is of the absolute spiritual unity of humanity, he knows that, even in this lower world, no true profit can be made by one man which is not made in the name of and for the sake of humanity; that one man's progress must be a lifting of the burden of all the others; that one man's advance in spiritual things means a very slight yet not imperceptible advance to humanity as a whole; that every one who bears suffering and sorrow nobly in his struggle towards the light is lifting a little of the heavy load of the sorrow and suffering of his brothers as well.
Because he recognizes this brotherhood not merely as a hope cherished by despairing men, but as a definite fact following in scientific series from all other facts; because he sees this as an absolute certainty, his attitude towards all those around him changes radically.

It becomes a posture ever of helpfulness, ever of the deepest sympathy, for he sees that nothing which clashes with their higher interests can be the right thing for him to do, or can be good for him in any way.
It naturally follows that he becomes filled with the widest possible tolerance and charity.

He cannot but be always tolerant, because his philosophy shows him that it matters little what a man believes, so long as he is a good man and true.