Mars square Lilith (orb 0.4°) creates concrete friction between the two planets. The orb is extremely tight; this aspect is one of the chart's strongest signals.
Here, Mars in Cancer in House 9 brings action, courage, competition, and effort into House 9 (vision, belief, study, and wider horizons), with Cancer style (memory, protection, belonging, and family sensitivity); Lilith in Libra in House 12 brings pure ideal, absolute demand, fascination, and refusal of compromise into House 12 (retreat, contemplation, long time, and possible confinement), with Libra style (relationship, balance, negotiation, and sense of form).
Concrete friction: this aspect creates tension between anger, desire, action, impossible ideal, and refusal to yield. Visible angle: Mars near the Midheaven (orb 0.6°) and Lilith near the Rising sign (orb 0.5°) touch angles; this aspect is easier to notice through social role, reputation, career, and public image; also through first impression, body language, reflexes, and entry style. House 9 (vision, belief, study, and wider horizons) is in friction with House 12 (retreat, contemplation, long time, and possible confinement); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.