A trine is a natural flow connecting 2 or more energies in the chart. When people are first learning astrology, they may be tempted to think that some aspects are good and some are bad. For example, trines are good and squares are bad. All aspects bring talents, challenges, lessons and gifts.
Mercury is the rational mind and how we communicate via language. It’s what makes sense to us, how we think and learn, how we process information.
Neptune is our intuition, creativity, empathy and compassion. Neptune is telepathy, psychic abilities, having a visceral understanding of the experiences of others.
When Mercury and Neptune form a trine, the rational mind and intuitive mind are in harmony with each other. These people are usually very creative and imaginative and often know things without first realizing how they know them. People with this placement often develop a talent for quickly coming up with a rational explanation or set of idea breadcrumbs to explain to others how they know something.
This aspect can also manifest as self-delusion where someone imagines a story and tells it to themselves so often they start to believe it’s true. They may also imagine what others believe and internalize that as true. For some, lying to themselves and others can be easy. They can also pick up on the thoughts and feelings of others and internalize them, both to their benefit and detriment.
Neptune is considered a soft planet, and Mercury a neutral planet, so generally they work well in a soft aspect (trine is soft). The important take away here is that these energies harmonize together. Whether that harmony expresses itself in a way that is helpful, useful, loving, spiritual etc. is determined by the rest of the chart and the life lived by the individual.
Using your own chart is the best way to understand astrology.
If you have a trine in your chart, think about how the energies flow with each other in you. If you have Mercury in an aspect, think about how that energy may impact how you think and what gets your mind going.
Pick any aspect and dive into the energies in the chart and see how they work together in you, and that will teach you something about how that aspect works.
What’s in your chart?