John Wesley on Psalms 45:7

Therefore - Therefore God hath exalted thee far above all men and angels, to a state of joy and endless glory at his right hand; which is fitly compared by the oil of gladness. Thy God - According to thy human nature, John 20:17, though in respect of thy Divine nature, thou art his fellow, Zech 13:7, and his equal, Phil 2:6, and one with him, John 10:30. Oil - So called, because it was a token of gladness, and used in feasts, and other solemn occasions of rejoicing. Fellows - Above all them who partake with thee in this unction: above all that ever were anointed for priests or prophets, or kings.