Man stands at the crossroads between righteousness and sin, and chooses whichever path he wishes. But after that the path which he has chosen to follow, and the guides assigned to it, whether angels and saints or demons and sinners, will lead him to the end of it, even if he has no wish to go there. The good guides lead him toward God and the kingdom of heaven, the evil guides toward the devil and age-long punishment. But nothing and no one is to blame for his destruction except his own free will. For God is the God of salvation, bestowing on us, along with being and well-being, the knowledge and strength that we cannot have without the grace of God. Not even the devil can destroy a man, compelling him to choose wrongly, or reducing him to impotence or enforced ignorance, or anything else; he can only suggest evil to him.
Thus he who acts rightly should ascribe the grace of so doing to God, for along with our being He has given us everything else. But the person who has opted for the path of evil, and actually commits evil, should blame only himself, for no one can force him to commit it, since God created him with free will. Hence he will merit God's praise when he chooses the path of goodness; for he does so, not from any necessity of his nature, as is the case with animals and inanimate things that participate passively in goodness, but as befits a being that God has honoured with the gift of intelligence. We ourselves deliberately and wilfully choose to do evil, being coached in it by its discoverer. God, who is good beyond goodness, does not force us, lest being forced and still disobeying we should be even more culpable. Nor does He take from us the freedom that in His goodness He has bestowed upon us.
Taken from The Philokalia Vol3 ,Saint Peter of Damaskos Book 1 "A Treasury of Divine Knowledge"