Example: I want to somehow define

\newenvironment{boxthis} { \fbox{ } % <-- note this is unbalanced { } } % <-- note this is unbalanced, but balances with the brackets in the above

such that

\begin{boxthis} this text is boxed \end{boxthis}

is equivalent to

\fbox{this text is boxed}

Is there a way to accomplish this? Thanks!