There's no CONTRADICTION.

those amuna gasses and still cry still feel sad amuna does not mean during Shiva you sing and you dance and you're happy because they're in a better place amuna means that during Shiva you sit you tear Crea you cry you're stricken with grief you're comforted and consoled because it stinks and it hurts and it's painful and it's traumatizing and a piece of you is gone is that in this roller coaster of life from the moments of high I'm happy I'm singing I'm dancing for the moments of grief leaning into those emotions genuinely feeling them and experiencing them but at the same time behind all of them informing and animating whatever we experience whatever emotions that we are overwhelmed with is the peace and the Tranquility of knowing it all comes from Hashem it's from Hashem that I'm in pain right now and feel the pain and it's from Hashem that I'm happy in singing and dancing right now and sing and dance but it's not the RO radical roller coaster of I believe in him I don't believe in him that's not the way we're meant to live like