The heart is a garden, and the mind is a kind of seed. It can grow flowers and weeds. It is impossible to plant only a seed of happiness, even if it is left behind, the weak seedlings will soon be swallowed by weeds. Those weeds of fear, doubt, and anxiety should be pulled out and discarded as soon as they grow. Love, happiness, and tranquility are all contagious, and those who continue to plant these seeds in the garden of mind are also putting love Happiness and tranquility spread to others' hearts. What does this passage mean? ["People's hearts are often full of fear, doubt and anxiety, and it is difficult to dispel.", 'We should always take care of the good and beautiful qualities in our hearts.', 'We should spread our love, happiness and tranquility to others.', "People's thirst for love, happiness, and tranquility is always consumed by fear, doubt and anxiety."]