Mercury in Capricorn squares Mars in Libra, at 27 degrees. Disagreements will be tense, but "polite" on the surface. Mercury in Capricorn says things properly, and Mars in Libra expresses anger indirectly. Words will be civil but edgy. Due to the Cardinal nature of these signs, socially appropriate ambitions may also be triggered.
The Sun in Capricorn sextiles Neptune in Pisces, at 7 degrees. Neptune gives practical or stoic matters a transcendent nudge. There's a gentle tug towards creativity, release, or forgiveness. It may be easier (and advisable) to relax. There's no risk (as with the hard aspects) of overdoing the Neptune plunge into delusion or escapism. This energy is about loosening the corset a couple of notches so you can exhale. While not as pronounced as the Mercury/Mars square, this sextile can soften the argument a bit.