If you say the sky’s the limit, then there has to be an end point, when you hit the sky. You can’t do that, however, since there is no limit to the sky and there’s no actual place where the sky begins. The word LIMIT means, “a point or levels beyond which something does not or may not extend or pass.” We really need to pay more attention to the things we say, believe, write and pass on to others.
1 a point or level beyond which something does not or may not extend or pass: the limits of presidential power | the 10-minute limit on speeches | there was no limit to his imagination.
• (often limits) the terminal point or boundary of an area or movement: the city limits | the upper limit of the tidal reaches.
• the furthest extent of one’s physical or mental endurance: Mary Ann tried everyone’s patience to the limit | other horses were reaching their limit.
2 a restriction on the size or amount of something permissible or possible: an age limit | a weight limit.
• a speed limit: a 30 mph limit.