During the laying of the foundations for the Second Temple, an intense wave of emotion swept through the crowd, creating a powerful and chaotic uproar. The people present were completely overwhelmed by conflicting reactions, making it nearly impossible to tell the difference between the sounds of joy and the sounds of weeping [ביאור שטיינזלץ].
The primary approach among commentators explains that this auditory confusion was caused by the sheer volume of the crying. Even though the celebrants shouted with great joy, the wailing of others steadily grew until it completely overpowered the happy cheers, echoing far into the distance [רש״י, מצודת דוד]. A closely related view suggests that the cries of sadness and the shouts of celebration simply blended together, merging into a single, massive roar that carried for miles [ביאור שטיינזלץ]. On the other hand, a different perspective argues that the inability to tell the voices apart had nothing to do with the human cries themselves. Instead, the deafening blasts of the horns drowned out all the people, and it was the sound of these horns that was heard from far away [מלבי״ם].
On a deeper level, the failure to distinguish the sounds was not just a matter of hearing, but of understanding. The general public did not realize that the joy and the weeping actually came from the exact same source. The sadness was rooted in the reality that the Temple was being rebuilt under the control and permission of a foreign ruler. While the wise leaders recognized the value in this and rejoiced at the simple opportunity to rebuild despite their lack of independence, the majority of the people missed this complex reality. They merely shouted in loud celebration without truly grasping the heavy circumstances behind the moment [מלבי״ם].