Gratitude does lead to a good feeling, but that isn’t necessarily why someone could sing of the Father’s love forever. One can sing as an expression and as an offering but not necessarily while feeling happy or feeling like dancing. When something traumatic happens, the natural (and appropriate) human reaction is to feel terrible. Feeling terrible does not bring about happiness or dancing, usually. But can someone feel terrible while at the same time being able to sing, honestly, of the Father’s love forever? Of course!Indeed. Consider the lyrics,
When peace, like a river, attendeth my way When sorrows like sea billows roll Whatever my lot, Thou hast taught me to say It is well, it is well with my soul - It is Well With My Soul, Horatio SpaffordSpafford wrote those lyrics while onboard a ship at the approximate location where another ship had sunk, a few weeks prior, killing his four daughters. Did he feel like dancing? Most assuredly not. But he did feel like worshipping.