You want the aspect that explains why your head and your heart argue across a table. That argument is in your chart. It is not written here.
What it looks like in a life
An opposition needs the two planets on opposite sides of the sky, and Mercury and Venus never get there. They orbit inside Earth's path and stay close to the Sun. The split people hunt for is usually Venus opposite Saturn, Mercury opposite Neptune, or Mercury and Venus in adjacent signs with nothing in common, like Capricorn Mercury and Aquarius Venus. That is two signs, not an aspect.
The gift
A wrong label sends you down a wrong road. Dropping it puts you back on the real question.
The friction
Reports that print impossible aspects usually have their orbs set wrong throughout. Recheck anything else in that report before you build on it.
The esoteric layer
The opposition was read as full moon logic: illumination through facing the other across the circle. These two never stand that far apart, so whatever opposes inside you is run by a different pair.
Where this goes
The oppositions your chart actually holds are where two sides of you are learning to share one life. A full natal reading names them and what each one asks for.
Related
See it in your own chart
Cast your chart free and read this placement next to everything else you carry.