Final answer:
The person described, who seemed always happy, is actually struggling internally with mental health issues, which are now becoming apparent through mental breakdowns.
Step-by-step explanation:
The main idea of the statement is that the person is struggling internally, despite the external facade of being funny, happy, and cool. This aligns closely with the recognition of a mental health concern the individual may be experiencing. It's important to understand that individuals can oscillate on a continuum between distress and enjoyment, often influenced by various factors known as meliors and stressors. What appears to be a consistent state of joy could be masking deeper emotional turmoil, which is highlighted when that typically joyful person begins to have mental breakdowns. The individual's true state of mind can become apparent through changes in behavior and mood, revealing the struggle that lay beneath the surface all along.