to doing

[tomolonight]

Can you explain this:

1) I know the obstacles hold the key to learning to see beyond a failure.
....I know the obstacles hold the key to learn to see beyond a filure.
....( which one is correct?)

2) What is the difference between ' to learning ' and ' to learn.
....Give me more examples.

[elhithebest]

Can you explain this:

1) I know the obstacles hold the key to learning to see beyond a failure.
....I know the obstacles hold the key to learn to see beyond a filure.
....( which one is correct?)

2) What is the difference between ' to learning ' and ' to learn.
....Give me more examples.

Hi I´m not a teacher at all

But I think the 1st one is correct because it refers to the noun not the verb.
Remember that to is a function word, it doesn´t just make the infinitive of a verb, but it also acts as a preposition(followd by a noun- in this case learning-) and as an adverb (without a following noun)

I hope it be of help, let´s wait and see what other people say

[Barb_D]

If you say "the obstacles THAT hold the key to learning" you imply there are specific obstacles that do this.

If you say "I know that obstacles hold the key to learning" you are making a statement about obstacles in general.

You need "learning" because as stated above, you need a noun. The key to what? The key to learning.