Often when wonders are heard of or seen we show surprise, for wonders are supposed to be something unusual or strange. To speak of wonders as lawful takes them out of the strange and unusual class and makes them conformable to accepted standards, duly authorized or established by law. If wonders can be lawful, then they are something we can rightfully expect to witness.
We are told by the Psalmist of some wonders experienced by the Israelites after they left the bondage of Pharaoh in Egypt (Ps. 114:5, 6): "What ailed thee, O thou sea, that thou fleddest? thou Jordan, that thou wast driven back? Ye mountains, that ye skipped like rams; and ye little hills, like lambs?" Mary Baker Eddy in the Christian Science textbook, "Science and Health with Key to the Scriptures" (p. 135), under a marginal heading, refers to these wonders as lawful.
We are also familiar with the Biblical accounts of water flowing from the rock and manna falling from the sky. It is interesting to note that these lawful wonders occurred after the people had started their journey toward freedom. Had they chosen to remain in bondage in Egypt, the Israelites might not have witnessed such events.