The painting "deep" is a metaphor that implies a deep and conscious immersion into one's thoughts, feelings, beliefs, and values.
The philosophical aspect involves exploring one's inner world, seeking profound truths about oneself, becoming aware of one's contradictions and the contradictions between one's self and the external world. By delving into oneself, a person can discover new aspects of their personality, accept their weaknesses and strengths, understand their needs and desires.
It is about seeking harmony and balance within oneself, finding one's true self and place in the world. Immersion requires openness, honesty, and self-criticism towards oneself.