Adam Clarke on Psalms 65:2

Unto thee shall all flesh come - All human beings should pray to God; and from him alone the sufficient portion of human spirits is to be derived. It is supposed to be a prediction of the calling of the Gentiles to the faith of the Gospel of Christ. A minister, immensely corpulent, began his address to God in the pulpit with these words: "O thou that hearest prayer, unto thee shall all flesh come!" and most unluckily laid a strong emphasis on All Flesh. The coincidence was ominous; and I need not say, the people were not edified, for the effect was ludicrous. I mention this fact, which fell under my own notice, to warn those who minister in righteousness to avoid expressions which may be capable, from a similar circumstance, of a ludicrous application. I have known many good men who, to their no small grief, have been encumbered with a preternatural load of muscles; an evil to be deprecated and deplored.