When they say the ark of Imam Hussein (as) is similar to the ark of Noah it means he lets in any type of living organism in his ship. You can even be turned into an animal with your actions and Imam Hussein (as) will still take you in his ship and guide you.
Ibn Ata Allah mentioned in his Aphorisms (Hikam), “There is not a single breath that you bring forth; except that there is an accompanying decree being implemented [by God].” Every breath is a gift from Allah. Guard it carefully and use the time that it demarcates wisely. Understand that you will be held accountable for everything you do during every moment you spend on Earth. It is said, “Whosoever is heedless concerning his reckoning, will be disappointed with his earning.”
Furthermore, try to make an effort to understand what the decree for each moment is. One of the greatest sources of frustration in our lives arises when we try to do something that Allah is not facilitating at a particular time. Our ship will move much quicker over the ocean of life when our sails are filled with the winds of Providence. Understanding the nature of the moment we are in helps to unfurl those sails
Had Allah lifted the veil for His slave and shown him how He handles his affairs for him, and how Allah is more keen for the benefit of the slave than his own self, his heart would have melted out of the love for Allah and would have been torn to pieces out of thankfulness to Allah. Therefore if the pains of this world tire you, do not grieve. For it may be that Allah wishes to hear your voice by way of Du’a. So pour out your desires in prostration and forget about it and know, that verily Allah does not forget.
What is human pain? It does not mean only physical pain. It is a pain considered sacred by mystics and is peculiar to human beings; and for this reason, a human being is preferable to an angel, for an angel is free from pain. That human pain is the pain of seeking God. Man is a reality produced by divine breath in another world, and is not wholly homogeneous with the things of this world. He has a feeling of strangeness and alienation with all other creatures here, since they are all changeable and perishable and not worthy of attachment. Man, however, has a perpetual anxiety, and this is what draws him towards devotion and worship of God, communion with Him, and proximity to Him, as his origin.