The only limit to our realization of tomorrow will be our doubts of today.
解释:要紧紧抓住时机不能错过,错过了也不能延误太久。
The only way to do great work is to love what you do.
The elements of consciousness are to be determined by experimental analysis.
The ruling class has the means of material production at its disposal; the proletariat has nothing but their labor power.