~こととて      => because; since ~ N1
かりに...ても / としても => even if N2
Condition (hypothetical condition)
てこそ => now that; since (something happened) N3
Relationship before and after
~をこめて => filled with; full of N2
にこたえ(て) => in response to ~ N2
こととて => Because A N1
Reason, Result, Response
てこそ => Now since A... N2
Reason, Result, Response
…たりしたら/しては => ... Such as N3
Demonstrate by example
に...がV-てあります => Object status N4
Description
てこそ => not until, only after, of all things N2
なんてことない => Nothing serious, significant N3
Evaluate
ことにする/ことにしている => to decide on/have a habit N3