Chasidut על ברכות 9:20

In this portion are written three subjects: Matza, Maror and Tefilin. Matza teaches regarding the tzimtzum (contracting). Maror teaches that one should not ask for pleasures, as it is written in the Gemara (Brachot 5a): "three good gifts the Holy One of Blessing gave to Israel, and all of them were only given through sufferings" - that is, a person needs exertions, clarifications and doubts. And after that comes tefilin, that teaches regarding connecting [deeply with God], that Israel is connected to the Holy One of Blessing, because tefilin teaches about the seasons of light that is found in every action of Israel.