We are not eternally conditioned. You are eternally liberated but since we have become conditioned on account of our desire to enjoy materialistic way of life, from time immemorial, therefore it appears that we are eternally conditioned. Because we cannot trace out the history or the date when we became conditioned, therefore it is technically called eternally conditioned. Otherwise the living entity is not actually conditioned. A living entity is always pure. But he is prone to be attracted by material enjoyment and as soon as he agrees to place himself in material enjoyment, he becomes conditioned, but that is not permanent. Therefore a living entity is called on the marginal state, sometimes this side, sometimes that side. But best thing is that one should know he is in conditioned life and try to cure it. When a man is in diseased condition he should try to get out of diseased condition without harassing his brain when the disease has begun. But it is to be understood that the disease is not our constant companion, it is temporary. So the best thing is to cure the disease, and not waste our time to find out the date when it began. Forgetfulness of Krishna is the disease, so let us keep ourselves always in Krishna Consciousness, and get out of the disease, that is healthy life.
Ref >> Srila Prabhupada Vani.