The bodies of flying creatures are, as a rule, very strong, comparatively light and of an elongated form, - the bodies of birds being specially adapted for cleaving the air.
He was revered by the people cleaving to their altars and their fires, and his birthdays were calendared as festivals, on which greetings were sent to him by young and old.
There is generally a tendency in coals towards cleaving into cubical or prismatic blocks, but sometimes the cohesion between the particles is so feeble that the mass breaks up into dust when struck.
To paraphrase the old saying, the proof of the cleaving is in the living.
Rather than "cleaving to one only" they put a value on honesty and clear communication of emotion in relationships.