[kosta50]

Doulos is really a servant. A servant is not a slave (captive). When we become doulouoi of God, we do it on our own free will—giving ourselves to Christ (as the Liturgical text says). God does not compel or brainwash us into coming to Him; love does not rape.

[Kolokotronis]

"Doulos is really a servant."

Sorry; nope, a slave, not a σκλαβος, more of a what we think of as a servant but a slave nevertheless, Kosta mou. Brainwashing, compulsion, rape etc is not at all implicated by the word, however, which might well be implicated by σκλαβος.