To My Dear and Loving Husband
Conditional logic
Three "If ever" statements building to a challenge. She's not saying "we're happy"—she's saying "if anyone ever was, we are." Hypothetical framing makes an absolute claim.
"The East"
1650s shorthand for Asian trade wealth—spices, silk, gems from India and China. The Massachusetts Bay Colony was dirt poor; she's comparing domestic love to global empire.
Unquenchable thirst
Biblical echo of John 4:14—spiritual thirst that water can't satisfy. She's using Christ-language for marital love, which was theologically bold.
Eternal life
Puritan theology: earthly marriages end at death. She's arguing their love will survive into heaven, which contradicts "till death do us part."