This song is a story about a young couple who decide to get married at a young age ("Veil in ruins in the rain"). As soon as things get serious, the burning lust that was once in the couple was already burning out ("By then it was you I could do without"). But by then it was too late to back out and they already had kids on the way. The protagonist is now regretting the opportunities in life that he lost by settling down too early and he blames his wife and kids ("Although the kids are blessed the parents let them shoulder all the blame").
The "Quiet Things" are all these regrets that he has but can't tell anyone about. He has to bottle up his emotions by "Keeping the blood in your head, and your feet on the ground." These secrets are what he's talking about when he says "I lie for only you; and I lie well."
Damon - Seeley Lake, MT