Your actions will prove whether your words are evanescent or not.People often speak a lot however their actions doesn't suffice their words. It doesn't matter whether you aim high or have a lot to talk about, what matters the most are your efforts towards achieving or fulfilling your words. Sometimes even small actions are worth it, if done according to the expectations you've set. Many a times words spoken by us turn evanescent due to the lack of action taken towards proving it. Just as people say actions speaks louder than words, in the same way when actions are not equivalent to your words then these words become evanescent.
Once a person loses the worth of it's words and his words fades, the whole point of aiming high and doing efforts will go in vain so one should be aim what one can achieve and prove rather than something that is superficial, so that their actions go way beyond the expectations they set for themselves, with time.