Which lines in the poem suggest the preciousness of love?

Sonnet 12
by Elizabeth Barrett Browning

Indeed this very love which is my boast,
And which, when rising up from breast to brow,
[Doth crown me with a ruby large enow
To draw men's eyes and prove the inner cost,—]
This love even, all my worth, to the uttermost,
[I should not love withal, unless that thou
Hadst set me an example], shown me how,
[When first thine earnest eyes with mine were crossed],
And love called love.[ And thus, I cannot speak
Of love even, as a good thing of my own]:
Thy soul hath snatched up mine all faint and weak,
[And placed it by thee on a golden throne,—]
And that I love (O soul, we must be meek!)
Is by thee only, whom I love alone.

(Options are inside [ ]... More than one can be chosen.)

From the the lines When first thine earnest eyes with mine are crossed and And this, I cannot speak of love, as a good thing of my own you will see the geneuiness and preciousness of the love from it.

From the lines we can deduce the quality that render the love valuable and how the writer cherish Love.

Through the lines we can understand how beautiful and wonderful love is cherished and how a person can desire good and wonderful for the other person. It indicate the sincerity and truthfulness of the love to the other person.