The Trine
The trine is an easy harmonious aspect. There is no resistance, and the energy flows effortlessly. The planets involved support each other naturally.
Trines represent innate abilities - those that are second nature.
For example, a Sun trine Moon shows a natural harmony between yin and yang, masculine/feminine, active/receptive archetypes.
Having a transit with Uranus trine Moon is an easier experience than Uranus square Moon. Both point to emotional changes, but the manifestation is different. The person with the trine would naturally go through the necessary changes. He/she would adapt more comfortably to the new conditions.
The person with the square would have a more challenging time coping with sudden changes and instability.
Sextile
The last of the major aspects is the sextile. This is also a harmonious aspect flowing with ease between the energies involved. The sextile is less dynamic than the trine but has more “oomph” to it.
Sextiles are skills or talents that are drawn upon when required, and trines are those that are always there, being naturally expressed.
I want to look carefully at what I’ve seen as evidence of astrology at work. In this case ‘friendship’ and its manifestations over half a life time knowing some one. We see here the energies of the trine and sextile in Kelly’s chart. 👇 They are shown in blue below.

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☝️ I have shown the energy focusing on the 11th house of friendship above. Notice all the blue lines focusing into this house. The multiple sextiles from the 10th to the 11th house and from the second to the 11th. Yes there is one square that causes tension from her Sun to Uranus. However the strength of the trine from Saturn and Venus to Uranus in the 2nd house and all the other sextiles far out weight that one square there.
I have included this natal chart to show what is quite apparent and appreciated by this chart. This person knows how to be a friend and has the ability to draw upon friends when needed to continue her life mission.