It's an extract from a modern transcription of a Shakespeare's sonnet number 102. The full text being:
My love is strengthened though more weak in seeming,
I love not less, though less the show appear,
That love is merchandized, whose rich esteeming,
The owner's tongue doth publish every where.
Our love was new, and then but in the spring,
When I was wont to greet it with my lays,
As Philomel in summer's front doth sing,
And stops her pipe in growth of riper days:
Not that the summer is less pleasant now
Than when her mournful hymns did hush the night,
But that wild music burthens every bough,
And sweets grown common lose their dear delight.
Therefore like her, I sometime hold my tongue:
Because I would not dull you with my song.
What this does mean however is that the rules of grammar don't apply in quite the same way as in modern prose. Furthermore it is written in iambic pentameter.
The meaning is actually pretty difficult to decipher, but it is believed that Shakespeare is equating the idea of spring with love. Personally I believe that Shakespeare may be using spring in a metaphorical sense. That is to say, spring is a traditionally a time of new birth and creation of new life, and he is using this symbolism to reinforce the idea of new love for another.