彼(かれ)は手(て)のひらに載(の)せた種(たね)が芽吹(めぶ)くのを、静(しず)かに見守(みまも)った。

He quietly watched over the seed he had placed in his palm as it sprouted.

彼(かれ)は手(て)のひらを返(かえ)したように態度(たいど)を変(か)えた。

He changed his attitude with astonishing abruptness.