I understand what you are saying, and some Christians do that, when they invoke specific saints and angels. It might help if you stated what results you are seeking? If it's love, I see no harm in calling on Aphrodite, for instance. She is just one of the aspects of the Goddess. I invoked Diana, and worked with moon phases when I wanted my husband. I used the waxing moon, because I wanted all of him, and not just his body, or a short term relationship. I have told him since. He says it's the best spell I ever made. I give him a "booster shot", occasionally.
Do you Cast? It's a form of prayer, I think. The intention must always be good.