Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said to his wife: "Is today better, or yesterday?" She said: I do not know. He said: "But I know: yesterday was better than today, and today is better than tomorrow, and so it will continue until the Hour is established."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 8741