enter into the spirit
enter into the spirit (of something)
To show one's interest in enjoying a social event by dressing appropriately or participating in related activities. I specifically wore red and green to enter into the spirt of Christmas. Come on, dance with us! Enter into the spirit!
enter into the spiritjoin wholeheartedly in an event.
1994 Jonathan Coe What a Carve Up! His sarcasm was mischievous rather than icy, so I tried to enter into the spirit.