さてこそ
Adverb
1. just as I thought, as expected
2. that's why
あってこその
Expression, Noun or verb acting prenominally, See あっての, See こそ・1, emphatic version of あっての
which can exist solely due to the presence of, whose existence is determined entirely by, which owes everything to
身を捨ててこそ浮かぶ瀬もあれ, 身を捨ててこそ浮かぶ瀬も有れ, みをすててこそうかぶせもあれ
Expression, Proverb
nothing ventured, nothing gained