14 But Holy Scripture refutes this, for it teaches us that pleasure was suggested to Adam and Eve by the craft and enticements of the serpent. Since, indeed, the serpent itself is pleasure, and therefore the passions of pleasure are various and slippery, and as it were infected with the poison of corruptions, it is certain then that Adam, being deceived by the desire of pleasure, fell away from the commandment of God and from the enjoyment of grace. How then can pleasure recall us to paradise, seeing that it alone deprived us of it?
Source: Letters (New Advent)