Vrksasana is a Level I pose. Utthita Ardha Padmottanasana (Upright Half Lotus) is a Level 2 pose and is a harder variation of Vrksasana. Can you see the resemblance? It is in the same family of asanas, lateral standing poses.
Controlling one’s consciousness to cultivate a yogic mind through sustained practice and dispassion helps prevent injuries and cultivates radical self-acceptance.
Abhyasa is a dedicated, unswerving, constant, and vigilant search into a chosen subject, pursued against all odds in the face of repeated failures, for indefinitely long periods of time.