You may be thinking, why start a series on knowing God through suffering with the most abstract and difficult doctrine known to Christians? Why not start with something simpler, like mercy or faithfulness? All in due time.
I start with the Trinity because who God is in his fullness of Father, Son, and Holy Spirit is the starting point for all our understanding about God. If we skip who God is at the very essence of his being, we may get off on the wrong foot. But even more importantly, the triune nature of God in his three persons is a gold mine for understanding the riches of God and his reasons for allowing his creatures to suffer.