首楞嚴義疏注經 5.445

5.445

如母憶子，佛也。若子逃逝，生也。雖憶何為，不會遇也。

'Like a mother remembering her child' is the Buddha. 'If the child flees and runs away' is sentient beings. 'Even though she remembers, what does it avail' means they do not meet.