1 John 5:3

And his commandments are not heavy; not burdensome. Not but that they comprehend what seems hard to human frailty, and especially to men carried away with the love of vanities in this world, who think it hard to comply with Christ's doctrine of self-denials, of renouncing their inclinations, of suffering death, sooner than to sin against God, or to renounce their faith: but the love of God, and the promises of an eternal happiness in the next life, with the assistances which God gives them, make the yoke of Christ sweet, and his burden light. See Matthew xi. 30. How different is this doctrine from that of those late heretics, who pretend that God's commandments are impossible, even to just men, when they employ all their endeavours. See the first proposition of Jansenius, and this heresy of Calvin condemned by the council of Trent, session 6, cap. xi. canon. 18. (Witham)