feel something in one's bones

Example: “I can feel it in my bones: this is going to be our year.”

Origin: Rooted in a genuine, widely reported physical phenomenon: people with old fractures or arthritis have long claimed they can feel an approaching change in the weather through ache or stiffness in the healed or affected bone, tied to shifts in barometric pressure ahead of rain. That connection between bones and foreknowledge is old enough to appear in Shakespeare's Timon of Athens, where the Third Lord, told that Timon has gone mad, replies "I feel't upon my bones," already treating bone-deep sensation as a mark of certain, physically-grounded knowledge. The idiom generalized from that specific weather-prediction claim into a broader figure for any strong, instinctive conviction that feels rooted in the body rather than reasoned out in the mind.