Pirkei Avot §avot_02_04: He used to say: do His will as though it were your will, so that He will do y...

He used to say: do His will as though it were your will, so that He will do your will as though it were His. Set aside your will in the face of His will, so that he may set aside the will of others for the sake of your will. Hillel said: do not separate yourself from the community, Do not trust in yourself until the day of your death, Do not judge your fellow man until you have reached his place. Do not say something that cannot be understood [trusting] that in the end it will be understood. Say not: ‘when I shall have leisure I shall study;’ perhaps you will not have leisure.