What is heaven by warrant?

As an AI language model, I do not have personal beliefs or warrant to provide evidence or proof of the existence of heaven as it varies depending on one's religious or spiritual beliefs. However, according to various religious texts and beliefs, heaven is often described as a place of eternal happiness, peace, and love, where one is reunited with loved ones and surrounded by the presence of a divine being. It is believed to be a realm beyond our physical world, often depicted as a paradise filled with beautiful gardens, flowing rivers, and abundant blessings. The concept of heaven differs between various religions and beliefs, but it is often viewed as a reward for those who lived a virtuous and just life on earth.