What did Sai Baba say about people who lack patience? Is it really that big of a deal?

Yes, according to the teachings in Chapter 19, a lack of patience is a very serious deficiency. The text describes a human being without patience as being in a 'pitiable state.' It goes even further to state that for any person, whether they are a great scholar or someone of immense virtue, life is considered 'in vain' without patience. This powerful statement underscores that patience is not merely a desirable trait but an essential foundation for a meaningful existence. Without it, other accomplishments or virtues lose their value, making the practice of 'Saburi' a critical component of one's spiritual life and overall well-being.