Tao is not an immortal, Buddhism is not a Buddha, it is only the heart.
The goal of cultivating Taoism is to become an immortal, and the goal of cultivating Buddhism is to become a Buddha, but they are just obsessions.
I am transformed into a solitary boat, with neither a boat to carry people, nor a long sail, nor a bamboo pole, drifting with the waves, and going wherever the wind blows.