And since that Christ saith that no man hath more love than for to put his life for his friend's, this blessed hanging of Christ on the cross is that high charity that God loved man in, and this charity is the Holy Ghost . . . There be many witnesses and reasons to the Trinity, but this manner of love is more plenteous and more profitable to men; and therefore Christ saith it thus, and thus each man should rule all his life after this Holy Trinity, for else he must fail. Look first that he be grounded in stable beginning, and then that he proceed in gracious mean, and then that he end in fullness of charity, and then his life is ensampled after the Trinity.
John Wycliffe: Sermons.