come to one's senses

verb2

1. •
   To reawaken after having lost consciousness.

   • He turned toward the door, plunged forward, fell unconscious. . . . When he came to his senses he was in his bed—comfortable, weak, lazy. — 1904
2. •
   To become reasonable, comprehending, or responsible, especially after having behaved in an unreasonable, confused, uncomprehending, or irresponsible manner.

   • “I shall never divorce you,” he said, as if a nail had been driven in. . . . She went upstairs and told Hilda the upshot. “Better get away tomorrow,” said Hilda, “and let him come to his senses.” — 1928