Meaning
Implementation is the heavy labor that gives life and stability to intellectual concepts.
Usage Context
Used to warn a 'thinker' that they are neglecting the practical work needed to make their plans succeed.

The 'head' (vision/strategy) can imagine incredible things, but without the 'buttocks' (the structural foundation/physical labor) to sit and perform the work, the ideas remain weightless and ineffective. It is a corrective against intellectual arrogance. True success requires the alignment of the highest vision with the most basic, physical persistence.
Implementation is the heavy labor that gives life and stability to intellectual concepts.
Used to warn a 'thinker' that they are neglecting the practical work needed to make their plans succeed.
The head thinks, but the buttocks carry the weight. Ideas must be supported by practical implementation. A vision without a foundation is just a dream that cannot stand.